Screw-staple.



Patented July l l, I899.

W. F. SCHALL.

SCREW STAPLE.

(Application filed Apr. 12, 1899.)

(No Model.)

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WITNESSES: M

ATTORNEYS UNITED; STATES PATENT OFFICE.

IVILLIAM F. SOHALL, OF NEW YORK, N.

SCREW-STAPLE.

SPECIFICATION forming part of Letters Patent No. 628,612, dated July 11, 1899.

Application filed April 12, 1899. Serial No. 712,753. (No model.)

My invention relates to screw-staples, and

has for its object to produce a staple which may be driven into a partition or board and whose legs may be securely fastened therein, as will be fully hereinafter set forth.

My invention will be understood by referring to the accompanying drawings, wherein I have shown a staple embodying my invention.

In the drawings, Figure 1 shows a staple as it is preferably used, and Fig. 2 is a view of the staple.

It will be understood that I will herein describe my invention and particularly point out the distinguishing features thereof in the claims.

Referring to Fig. 2, ais the staple, consisting of the usual bent portion 1) and the legs 0. These legs 0 are screw-threaded, as at d, and terminate in sharpened or pointed ends 8.

In Fig. 1 the staple a is shown as driven through a board A and engaged upon the opposite side by a slotted counter-plate f, nuts 9 being secured upon the screw-threaded portions of the staple outside of said counterplate, the exposed points being covered bya batten B, secured in place by a nail h.

It will be observed that I have produced a structure which may be readily driven into a door or box or other board or partition and may be effectively anchored therein by the nuts g, which'may be supplemented by the counter-plate f.

The screw-thread employed on the legs of thestaple is whatis known as a metal thread in contradistinction to such threads as are shown in United States patent to Adams, No. 262,635, dated August 15, 1882, the former being adapted to receive an ordinary nut and the latter being unadapted for the performance of such function.

Having described my invention, what I claim, and desire to secure by Letters Patent, is-

1. As a new and useful article of manufacture, a staple provided with two pointed or sharpened legs so as to be adapted to be driven into wood, the said legs being screwthreaded with a metal thread for the reception of a nut or nuts, substantially as described.

2. In a staple structure, the combination of a sharpened or pointed screw-threaded staple combined with a counter-plate f and nuts carried upon the screw-threaded portion of the staple outside of said counter-plate, substantially as described and for the purposes set forth.

v WILLIAM F. SOHALL.

Witnesses:

GEO. E. MORSE, Orro v. SCHRENK. 

